return(xbt_fifo_getFirstItem(h_simdata->mbox[channel])!=NULL);
}
+/** \ingroup msg_gos_functions
+ * \brief Test whether there is a pending communication on a channel, and who sent it.
+ *
+ * It takes one parameter.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \return -1 if there is no pending communication and the PID of the process who sent it otherwise
+ */
+int MSG_task_probe_from(m_channel_t channel)
+{
+ m_host_t h = NULL;
+ simdata_host_t h_simdata = NULL;
+ xbt_fifo_item_t item;
+ m_task_t t;
+
+ CHECK_HOST();
+ h = MSG_host_self();
+ h_simdata = h->simdata;
+
+ item = xbt_fifo_getFirstItem(((simdata_host_t)h->simdata)->mbox[channel]);
+ if (!item || !(t = xbt_fifo_get_item_content(item)) || (simdata_task_t)t->simdata)
+ return -1;
+
+ return MSG_process_get_PID(((simdata_task_t)t->simdata)->sender);
+}
+
/** \ingroup msg_gos_functions
* \brief Put a task on a channel of an host and waits for the end of the
* transmission.
